//Rich HTML Balloon Tooltip: http://www.dynamicdrive.com/dynamicindex5/balloontooltip.htm
//Created: September 10th, 2006

var disappeardelay=250  //tooltip disappear delay (in miliseconds)
var verticaloffset=0 //vertical offset of tooltip from anchor link, if any
var enablearrowhead=1 //0 or 1, to disable or enable the arrow image
var arrowheadimg=["ajax/arrowdown.gif", "ajax/arrowup.gif"] //path to down and up arrow images
var arrowheadheight=6 //height of arrow image (amount to reveal)

/////No further editting needed

var ie=document.all
var ns6=document.getElementById&&!document.all
verticaloffset=(enablearrowhead)? verticaloffset+arrowheadheight : verticaloffset

function getposOffset(what, offsettype){
	var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
	var parentEl=what.offsetParent;
	while (parentEl!=null){
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
	return totaloffset;
}

function showhide(obj, e){
	dropmenuobj.style.left=dropmenuobj.style.top="-500px"
	if (e.type=="mouseover")
		obj.visibility="visible"
}

function iecompattest(){
	return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function clearbrowseredge(obj, whichedge){
	if (whichedge=="rightedge"){
		edgeoffsetx=0
		
		var windowedge=ie && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
		
		dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
		
		if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
			edgeoffsetx=dropmenuobj.contentmeasure-obj.offsetWidth
		
		return edgeoffsetx
	} else{
		edgeoffsety=0
		
		var topedge=ie && !window.opera? iecompattest().scrollTop : window.pageYOffset
		var windowedge=ie && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
		
		dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
		
		if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure) //move up?
			edgeoffsety=dropmenuobj.contentmeasure+obj.offsetHeight+(verticaloffset*2)
			
		return edgeoffsety
	}
}

	function  isEmpty(divId) {
		return  document.getElementById(divId).innerHTML.length<1;
	}

function displayballoontip(obj, e){ //main ballooon tooltip function
	if (window.event) 
		event.cancelBubble=true
	else if (e.stopPropagation) 
		e.stopPropagation()
		
	if (typeof dropmenuobj!="undefined") //hide previous tooltip?
		dropmenuobj.style.visibility="hidden"
	
	clearhidemenu()
	//obj.onmouseout=delayhidemenu
	dropmenuobj=document.getElementById(obj.getAttribute("rel"))
	showhide(dropmenuobj.style, e)
	dropmenuobj.x=getposOffset(obj, "left")
	dropmenuobj.y=getposOffset(obj, "top")+verticaloffset
	dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px"
	dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px"
	
	if (enablearrowhead)
		displaytiparrow()
	
	if (isEmpty(obj.getAttribute("rel")))
		ajax_loadContent(obj.getAttribute("rel"),'ajax/dyncontent.php?f='+obj.getAttribute("href"));
}

function displaytiparrow(){ //function to display optional arrow image associated with tooltip
	tiparrow=document.getElementById("arrowhead")
	tiparrow.src=(edgeoffsety!=0)? arrowheadimg[0] : arrowheadimg[1]
	
	var ieshadowwidth=(dropmenuobj.filters && dropmenuobj.filters[0])? dropmenuobj.filters[0].Strength-1 : 0
	
	//modify "left" value depending on whether there's no room on right edge of browser to display it, respectively
	tiparrow.style.left=(edgeoffsetx!=0)? parseInt(dropmenuobj.style.left)+dropmenuobj.offsetWidth-tiparrow.offsetWidth-10+"px" : parseInt(dropmenuobj.style.left)+5+"px"
	//modify "top" value depending on whether there's no room on right edge of browser to display it, respectively
	tiparrow.style.top=(edgeoffsety!=0)? parseInt(dropmenuobj.style.top)+dropmenuobj.offsetHeight-tiparrow.offsetHeight-ieshadowwidth+arrowheadheight+"px" : parseInt(dropmenuobj.style.top)-arrowheadheight+"px"
	tiparrow.style.visibility="visible"
}

function delayhidemenu(){
	delayhide=setTimeout("dropmenuobj.style.visibility='hidden'; dropmenuobj.style.left=0; if (enablearrowhead) tiparrow.style.visibility='hidden'",disappeardelay)
}

function clearhidemenu(){
	if (typeof delayhide!="undefined")
		clearTimeout(delayhide)
}

function reltoelement(linkobj){ //tests if a link has "rel" defined and it's the ID of an element on page
	var relvalue=linkobj.getAttribute("rel")
	return (relvalue!=null && relvalue!="" && document.getElementById(relvalue)!=null && document.getElementById(relvalue).className=="balloonstyle")? true : false
}

function initalizetooltip(){
	var all_links=document.getElementsByTagName("a")
	if (enablearrowhead){
		tiparrow=document.createElement("img")
		tiparrow.setAttribute("src", arrowheadimg[0])
		tiparrow.setAttribute("id", "arrowhead")
		document.body.appendChild(tiparrow)
	}
	for (var i=0; i<all_links.length; i++){
		if (reltoelement(all_links[i])){ //if link has "rel" defined and it's the ID of an element on page
			all_links[i].onmouseover=function(e){
				var evtobj=window.event? window.event : e
				displayballoontip(this, evtobj)
			}
			all_links[i].onmouseout=delayhidemenu
		}
	}
}

if (window.addEventListener)
	window.addEventListener("load", initalizetooltip, false)
else if (window.attachEvent)
	window.attachEvent("onload", initalizetooltip)
else if (document.getElementById)
	window.onload=initalizetooltip
